Spectroscopic Data

September 2009

Transition probabilities for Be, C, N and O and their ions are needed, as well as data for heavy elements like Fe, Cl, Kr, Mo, Cu and W.

Transition probabilities for H, D,T, He, Li, Na, Mg, Al, Si and S are done for all ionization stages at the NIST Data Center for Atomic Spectroscopy. Data compilations for Be, B, Ne, Ar and Cs are in progress.

Energy levels and wavelengths for metallic ions and high-Z impurities are needed.

W: compilation of some structure data (ionization energies, low lying energy levels etc.) is complete for all ionization stages of W. More detailed data are needed for most ionization stages.

Xe, Kr and Ar: There are urgent needs of data production for high ionization stages. First compilations for Kr and Xe have been completed, but they are rather incomplete. Argon is of interest for further work.

Data for Hf and Ta are identified as of possible importance for erosion measurements and for spectral comparisons.

Complete spectroscopic characterizations of heavy noble gas ions are needed. Ne is in good shape and progress is being made on Ar.

Some of the following data, where needs are identified, may already be available in some molecular databases.

Impurity plasma edge molecules (CO, CO2, CH4, CH, C2, BeH, BH, N2, LiH, CsH and other hydrocarbons and radicals, and hydrogen isotopic variants). The HITRAN database at Harvard CfA and other molecular databases may have some of this data.

November 2005

Transition probabilities for the Be-, B-like isoelectronic ions. Be, B, Ne, Mg, Si and S are done. Others are in the planning stage by NIST ASDC.

Updating and compilation of spectroscopic databases for Beq+ and Bq+ ions. Some work done and is in plans by NIST ASDC. Work done for H- and He- like.

Complete spectroscopic characterization of Ne and Ar ions, particularly the high ions of Ne. Ne almost done. Compilation of Xe desired and in progress. Data for Kr ions are also desired.

Spectroscopic characterization of H2, H2*, H2+, H3+ and isotopic variants. Impurity plasma edge molecules (CO, CO2, CH4, CH, CO and other hydrocarbons and radicals). The HITRAN database at Harvard CFA has some of this data. These are identified data needs that would require expanded capabilities for this DCN.